9-Stannafluorenes: 1,4-Dimetal Equivalents for Aromatic Annulation by Double Cross-Coupling
作者:Ikuhiro Nagao、Masaki Shimizu、Tamejiro Hiyama
DOI:10.1002/anie.200903779
日期:2009.9.28
Double or nothing! A straightforward and high‐yielding approach to a variety of polycyclic aromatic hydrocarbons has been achieved through palladium‐catalyzed annulation of 9,9‐dimethyl‐9‐stannafluorenes and dithienostannole with 1,2‐dihaloarenes (see scheme). In addition, 1,1‐dibromo‐1‐alkenes can also be applied to this annulation to produce dibenzofulvenes in excellent yields.
An organic light-emitting device includes a first electrode; a second electrode facing the first electrode; an emission layer disposed between the first electrode and the second electrode; and a hole transport region disposed between the first electrode and the emission layer.
Synthesis, Crystal Structures, and Electronic Properties of Nonlinear Fused Thienoacene Semiconductors
作者:Hayden T. Black、Shubin Liu、Valerie Sheares Ashby
DOI:10.1021/ol202662s
日期:2011.12.16
Two fused thienoacene compounds with two-dimensional ring connectivity were synthesized, and their semiconducting properties were characterized. Both compounds have a crystal structure comprised of herringbone arrays of tight pi-pi stacks. Strong pi-pi interactions lead to self-assembly into well-defined crystalline thin films from the vapor phase for both compounds. Field effect transistors were fabricated, affording identical hole mobilities of 3.0 x 10(-3) cm(2)/(V s) and l(on/off) > 10(5).